Stop Using Threads consumes a list of users and tells you which of those users interact with Threads. You can use it to remove Threads participants from your timeline.
You can find out the tool's opinion on you by entering your own name, or you can just Submit with default settings to find out about Gargron.
https://stop-using-threads.net/
Data practices, anti-abuse and opt-in/out are behind the link. If you didn't opt into search, you're not visible here either.